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/*
* Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
* Copyright (c) 2017-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include "netlink.h"
#include "netlink_sock_diag.h"
#include "nlattr.h"
#include <linux/sock_diag.h>
#include <linux/unix_diag.h>
#include "xlat/unix_diag_attrs.h"
#include "xlat/unix_diag_show.h"
DECL_NETLINK_DIAG_DECODER(decode_unix_diag_req)
{
struct unix_diag_req req = { .sdiag_family = family };
const size_t offset = sizeof(req.sdiag_family);
tprint_struct_begin();
PRINT_FIELD_XVAL(req, sdiag_family, addrfams, "AF_???");
tprint_struct_next();
if (len >= sizeof(req)) {
if (!umoven_or_printaddr(tcp, addr + offset,
sizeof(req) - offset,
(char *) &req + offset)) {
PRINT_FIELD_U(req, sdiag_protocol);
tprint_struct_next();
PRINT_FIELD_FLAGS(req, udiag_states,
tcp_state_flags, "1<<TCP_???");
tprint_struct_next();
PRINT_FIELD_U(req, udiag_ino);
tprint_struct_next();
PRINT_FIELD_FLAGS(req, udiag_show,
unix_diag_show, "UDIAG_SHOW_???");
tprint_struct_next();
PRINT_FIELD_COOKIE(req, udiag_cookie);
}
} else
tprint_more_data_follows();
tprint_struct_end();
}
static bool
decode_unix_diag_vfs(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct unix_diag_vfs uv;
if (len < sizeof(uv))
return false;
if (umove_or_printaddr(tcp, addr, &uv))
return true;
tprint_struct_begin();
PRINT_FIELD_DEV(uv, udiag_vfs_dev);
tprint_struct_next();
PRINT_FIELD_U(uv, udiag_vfs_ino);
tprint_struct_end();
return true;
}
static bool
print_inode(struct tcb *const tcp,
void *const elem_buf,
const size_t elem_size,
void *const opaque_data)
{
PRINT_VAL_U(*(uint32_t *) elem_buf);
return true;
}
static bool
decode_unix_diag_inode(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
uint32_t inode;
const size_t nmemb = len / sizeof(inode);
if (!nmemb)
return false;
print_array(tcp, addr, nmemb, &inode, sizeof(inode),
tfetch_mem, print_inode, 0);
return true;
}
static bool
decode_unix_diag_rqlen(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct unix_diag_rqlen rql;
if (len < sizeof(rql))
return false;
if (umove_or_printaddr(tcp, addr, &rql))
return true;
tprint_struct_begin();
PRINT_FIELD_U(rql, udiag_rqueue);
tprint_struct_next();
PRINT_FIELD_U(rql, udiag_wqueue);
tprint_struct_end();
return true;
}
static const nla_decoder_t unix_diag_msg_nla_decoders[] = {
[UNIX_DIAG_NAME] = decode_nla_str,
[UNIX_DIAG_VFS] = decode_unix_diag_vfs,
[UNIX_DIAG_PEER] = decode_nla_u32,
[UNIX_DIAG_ICONS] = decode_unix_diag_inode,
[UNIX_DIAG_RQLEN] = decode_unix_diag_rqlen,
[UNIX_DIAG_MEMINFO] = decode_nla_meminfo,
[UNIX_DIAG_SHUTDOWN] = decode_nla_u8,
[UNIX_DIAG_UID] = decode_nla_uid
};
DECL_NETLINK_DIAG_DECODER(decode_unix_diag_msg)
{
struct unix_diag_msg msg = { .udiag_family = family };
size_t offset = sizeof(msg.udiag_family);
bool decode_nla = false;
tprint_struct_begin();
PRINT_FIELD_XVAL(msg, udiag_family, addrfams, "AF_???");
tprint_struct_next();
if (len >= sizeof(msg)) {
if (!umoven_or_printaddr(tcp, addr + offset,
sizeof(msg) - offset,
(char *) &msg + offset)) {
PRINT_FIELD_XVAL(msg, udiag_type,
socktypes, "SOCK_???");
tprint_struct_next();
PRINT_FIELD_XVAL(msg, udiag_state,
tcp_states, "TCP_???");
tprint_struct_next();
PRINT_FIELD_U(msg, udiag_ino);
tprint_struct_next();
PRINT_FIELD_COOKIE(msg, udiag_cookie);
decode_nla = true;
}
} else
tprint_more_data_follows();
tprint_struct_end();
offset = NLMSG_ALIGN(sizeof(msg));
if (decode_nla && len > offset) {
tprint_array_next();
decode_nlattr(tcp, addr + offset, len - offset,
unix_diag_attrs, "UNIX_DIAG_???",
unix_diag_msg_nla_decoders,
ARRAY_SIZE(unix_diag_msg_nla_decoders), NULL);
}
}
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